diff --git a/README.md b/README.md
index ad8946a..d4313e5 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ zoffline can be installed on the same machine as Zwift or another local machine.
  
 * Install Docker
 * Create the docker container with:<br>
-  ``docker create --name zwift-offline -p 443:443 -p 80:80 -p 3024:3024/udp -p 3025:3025 -v </path/to/host/storage>:/usr/src/app/zwift-offline/storage -e TZ=<timezone> zoffline/zoffline``
+  ``docker create --name zwift-offline -p 443:443 -p 80:80 -p 3024:3024/udp -p 3025:3025 -p 53:53/udp -v </path/to/host/storage>:/usr/src/app/zwift-offline/storage -e TZ=<timezone> zoffline/zoffline``
   * You can optionally exclude ``-v </path/to/host/storage>:/usr/src/app/zwift-offline/storage`` if you don't care if your Zwift progress state is retained across zoffline updates (unlikely).
   * The path you pass to ``-v`` will likely need to be world readable and writable.
   * A list of valid ``<timezone>`` values (e.g. America/New_York) can be found [here](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones).